Bici Palermo Tuning – a group of teenagers from the Sicilian capital – spend anything up to €1,300 customising their bikes with car batteries and multiple speakers to develop thunderous sound systems. The police are not impressed

Bike theft is the scourge of cyclists around the world, with riders, manufacturers and the law struggling to coordinate a response. That was until city cop Rob Brunt and Xbox pioneer J Allard devised Project 529